{"id":5168,"date":"2026-06-22T09:34:42","date_gmt":"2026-06-22T07:34:42","guid":{"rendered":"https:\/\/computershop.eu\/blog\/?p=5162"},"modified":"2026-06-22T09:44:39","modified_gmt":"2026-06-22T07:44:39","slug":"mise-a-jour-de-secure-boot-pour-windows-et-linux","status":"publish","type":"post","link":"https:\/\/computershop.eu\/blog\/fr\/mise-a-jour-de-secure-boot-pour-windows-et-linux","title":{"rendered":"Mise \u00e0 jour de Secure Boot pour Windows et Linux"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<p class=\"wp-block-paragraph\">La s\u00e9curit\u00e9 des syst\u00e8mes d&#8217;exploitation Windows et Linux entre dans une nouvelle \u00e9tape importante. Un changement majeur li\u00e9 au m\u00e9canisme de Secure Boot oblige les utilisateurs et les organisations \u00e0 mettre \u00e0 jour leurs syst\u00e8mes. Cette mise \u00e0 jour est n\u00e9cessaire pour \u00e9viter des vuln\u00e9rabilit\u00e9s qui pourraient compromettre le processus de d\u00e9marrage des appareils. Les sp\u00e9cialistes de la s\u00e9curit\u00e9 avertissent que l&#8217;expiration de certains certificats essentiels utilis\u00e9s par Microsoft et de nombreuses distributions Linux repr\u00e9sente un moment critique pour la protection contre les attaques de type bootkit et firmware malware.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu&#8217;est-ce que Secure Boot et pourquoi est-ce si important ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Secure Boot est une fonction de s\u00e9curit\u00e9 int\u00e9gr\u00e9e dans le firmware UEFI des ordinateurs modernes. Son r\u00f4le est de v\u00e9rifier l&#8217;authenticit\u00e9 des composants logiciels d\u00e8s le moment du d\u00e9marrage du syst\u00e8me. Ainsi, seules les applications et les composants sign\u00e9s num\u00e9riquement par des entit\u00e9s de confiance peuvent \u00eatre ex\u00e9cut\u00e9s avant le chargement du syst\u00e8me d&#8217;exploitation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette technologie repr\u00e9sente la premi\u00e8re ligne de d\u00e9fense contre les menaces qui tentent de compromettre le processus de d\u00e9marrage. Contrairement aux malwares traditionnels, les bootkits s&#8217;installent avant que Windows ou Linux ne soient charg\u00e9s, ce qui leur permet de contourner les solutions antivirus et les m\u00e9canismes de protection habituels.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pourquoi la mise \u00e0 jour des certificats Secure Boot est-elle urgente ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le probl\u00e8me survient car une s\u00e9rie de certificats cryptographiques utilis\u00e9s dans l&#8217;infrastructure Secure Boot sont sur le point d&#8217;expirer. Ces certificats ont \u00e9t\u00e9 \u00e9mis initialement en 2011 et ont servi de base \u00e0 la cha\u00eene de confiance pour des millions d&#8217;appareils \u00e0 travers le monde. Microsoft introduit maintenant une nouvelle g\u00e9n\u00e9ration de certificats, \u00e9mis en 2023, qui remplaceront les anciennes cl\u00e9s de s\u00e9curit\u00e9 et resteront valables jusqu&#8217;en 2038.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sans cette transition, les syst\u00e8mes concern\u00e9s risquent de ne plus pouvoir recevoir des mises \u00e0 jour essentielles pour les composants de d\u00e9marrage, les listes de r\u00e9vocation et d&#8217;autres m\u00e9canismes de protection contre les vuln\u00e9rabilit\u00e9s d\u00e9couvertes \u00e0 l&#8217;avenir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Que se passe-t-il si vous ignorez la mise \u00e0 jour ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La bonne nouvelle est que le PC ne cessera pas brusquement de fonctionner. Le syst\u00e8me d&#8217;exploitation continuera \u00e0 d\u00e9marrer, et la plupart des applications fonctionneront normalement. Cependant, le risque appara\u00eet \u00e0 moyen et long terme. Les appareils qui ne font pas la transition vers les nouveaux certificats perdront l&#8217;acc\u00e8s \u00e0 certaines mises \u00e0 jour de s\u00e9curit\u00e9 pour le processus de d\u00e9marrage et deviendront plus vuln\u00e9rables \u00e0 des attaques sophistiqu\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cela est particuli\u00e8rement important dans le contexte des menaces modernes, telles que BlackLotus, l&#8217;un des bootkits les plus connus d\u00e9couverts ces derni\u00e8res ann\u00e9es. Celui-ci a d\u00e9montr\u00e9 que les attaquants peuvent compromettre les syst\u00e8mes m\u00eame lorsqu&#8217;ils sont compl\u00e8tement \u00e0 jour, si la structure de Secure Boot est vuln\u00e9rable.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L&#8217;impact de la mise \u00e0 jour des certificats Secure Boot sur les utilisateurs de Windows<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pour les utilisateurs de Windows 10 et Windows 11, le processus de mise \u00e0 jour est en grande partie automatique. Microsoft distribue les nouveaux certificats via Windows Update, et la plupart des utilisateurs n&#8217;ont pas besoin d&#8217;effectuer des op\u00e9rations complexes. Cependant, il est recommand\u00e9 de :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Installer toutes les mises \u00e0 jour Windows disponibles.<\/li>\n\n\n\n<li>V\u00e9rifier si Secure Boot est activ\u00e9.<\/li>\n\n\n\n<li>Mettre \u00e0 jour le BIOS ou le firmware si le fabricant de l&#8217;appareil propose de nouvelles versions.<\/li>\n\n\n\n<li>\u00c9viter de d\u00e9sactiver Secure Boot pour r\u00e9soudre des probl\u00e8mes temporaires de compatibilit\u00e9.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Les syst\u00e8mes plus anciens peuvent rencontrer des difficult\u00e9s si le firmware ne prend pas en charge les nouveaux certificats. Dans de telles situations, la mise \u00e0 jour du BIOS devient essentielle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ce que doivent savoir les utilisateurs de Linux<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Dans l&#8217;\u00e9cosyst\u00e8me Linux, la situation est plus complexe car chaque distribution g\u00e8re ses propres mises \u00e0 jour. Des distributions populaires comme Ubuntu, Fedora et Debian ont d\u00e9j\u00e0 commenc\u00e9 \u00e0 publier des mises \u00e0 jour pour des composants tels que shim et GRUB. Celles-ci sont n\u00e9cessaires pour la compatibilit\u00e9 avec les nouveaux certificats Secure Boot.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les administrateurs et les utilisateurs avanc\u00e9s doivent s&#8217;assurer que :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Le syst\u00e8me est compl\u00e8tement \u00e0 jour.<\/li>\n\n\n\n<li>Les paquets shim et GRUB sont \u00e0 jour.<\/li>\n\n\n\n<li>Le firmware UEFI est \u00e0 jour.<\/li>\n\n\n\n<li>Secure Boot fonctionne correctement apr\u00e8s l&#8217;application des mises \u00e0 jour.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Recommandations pour les entreprises et les \u00e9quipes IT<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Les organisations qui g\u00e8rent des centaines ou des milliers d&#8217;appareils doivent traiter cette transition comme un projet strat\u00e9gique de s\u00e9curit\u00e9. L&#8217;inventaire des \u00e9quipements, la v\u00e9rification des versions de firmware et le test des mises \u00e0 jour sur diff\u00e9rents mod\u00e8les mat\u00e9riels sont des \u00e9tapes essentielles pour \u00e9viter les incidents op\u00e9rationnels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les entreprises qui continuent d&#8217;utiliser des \u00e9quipements anciens, sans support pour les nouveaux certificats, doivent analyser les risques et envisager le remplacement du mat\u00e9riel non actualisable.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pas seulement une proc\u00e9dure technique de routine<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La mise \u00e0 jour des certificats Secure Boot n&#8217;est pas seulement une proc\u00e9dure technique de routine, mais un moment important pour la s\u00e9curit\u00e9 des \u00e9cosyst\u00e8mes Windows et Linux. Bien que les syst\u00e8mes continueront \u00e0 fonctionner apr\u00e8s la date limite, le manque de mise \u00e0 jour peut r\u00e9duire consid\u00e9rablement le niveau de protection contre les attaques modernes visant le firmware et le processus de d\u00e9marrage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour les utilisateurs individuels et les organisations, la meilleure strat\u00e9gie est simple : maintenir les syst\u00e8mes \u00e0 jour, v\u00e9rifier l&#8217;\u00e9tat de Secure Boot et appliquer les <a href=\"https:\/\/computershop.eu\/blog\/fr\/demarrage-securise-sous-windows-mise-a-jour-davril-2026\" target=\"_blank\" rel=\"noreferrer noopener\">mises \u00e0 jour de firmware<\/a> recommand\u00e9es par les fabricants. Ainsi, les appareils b\u00e9n\u00e9ficieront toujours des derni\u00e8res mesures de s\u00e9curit\u00e9. C&#8217;est une mesure de protection essentielle contre les menaces cybern\u00e9tiques en constante \u00e9volution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sources :&nbsp;<a href=\"https:\/\/arstechnica.com\/security\/2026\/06\/windows-and-linux-users-the-deadline-to-update-secure-boot-keys-is-near\" target=\"_blank\" rel=\"noreferrer noopener\">arstechnica.com<\/a>,&nbsp;<a href=\"https:\/\/www.malwarebytes.com\/blog\/how-to\/2026\/05\/your-windows-pc-has-a-security-deadline-in-june-2026\" target=\"_blank\" rel=\"noreferrer noopener\">malwarebytes.com<\/a><\/p>\n\t<div class=\"quickshare-container\">\r\n\t<ul class=\"quickshare-genericons monochrome quickshare-effect-expand\">\r\n\t\t<li class=\"quickshare-share\">Share:<\/li> \r\n\t\t<li><a href=\"https:\/\/facebook.com\/sharer.php?u=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fmise-a-jour-de-secure-boot-pour-windows-et-linux&amp;t=Mise+%C3%A0+jour+de+Secure+Boot+pour+Windows+et+Linux+<+Refurbished+Computers+-+ComputerShop.EU\" target=\"_blank\" title=\"Share on Facebook\"><span class=\"quickshare-facebook\">Facebook<\/span><\/a><\/li>\t\t<li><a href=\"https:\/\/twitter.com\/intent\/tweet?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fmise-a-jour-de-secure-boot-pour-windows-et-linux&amp;text=Mise+%C3%A0+jour+de+Secure+Boot+pour+Windows+et+Linux+<+Refurbished+Computers+-+ComputerShop.EU\" target=\"_blank\" title=\"Share on Twitter\"><span class=\"quickshare-twitter\">Twitter<\/span><\/a><\/li>\t\t<li><a href=\"http:\/\/pinterest.com\/pin\/create\/button\/?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fmise-a-jour-de-secure-boot-pour-windows-et-linux&amp;media=https%3A%2F%2Fcomputershop.eu%2Fblog%2Fwp-content%2Fuploads%2F2026%2F06%2FSecure-Boot-300x168.png&amp;description=La+s%C3%A9curit%C3%A9+des+syst%C3%A8mes+d%27exploitation+Windows+et+Linux+entre+dans+une+nouvelle+%C3%A9tape+importante.+Un+changement+majeur+li%C3%A9+au+m%C3%A9canisme+de+Secure+Boot+oblige+les+utilisateurs+et+les+organisations+%C3%A0+mettre+%C3%A0+jour+leurs+syst%C3%A8mes.+Cette+mise+%C3%A0+jour+est%26hellip%3B\" target=\"_blank\" title=\"Share on Pinterest\"><span class=\"quickshare-pinterest\">Pinterest<\/span><\/a><\/li>\t\t<li><a href=\"http:\/\/linkedin.com\/shareArticle?mini=true&amp;url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fmise-a-jour-de-secure-boot-pour-windows-et-linux&amp;title=Mise+%C3%A0+jour+de+Secure+Boot+pour+Windows+et+Linux&amp;source=Refurbished+Computers+-+ComputerShop.EU&amp;summary=La+s%C3%A9curit%C3%A9+des+syst%C3%A8mes+d%27exploitation+Windows+et+Linux+entre+dans+une+nouvelle+%C3%A9tape+importante.+Un+changement+majeur+li%C3%A9+au+m%C3%A9canisme+de+Secure+Boot+oblige+les+utilisateurs+et+les+organisations+%C3%A0+mettre+%C3%A0+jour+leurs+syst%C3%A8mes.+Cette+mise+%C3%A0+jour+est%26hellip%3B\" title=\"Share on Linkedin\" target=\"_blank\"><span class=\"quickshare-linkedin\">Linkedin<\/span><\/a><\/li>\t\t<li><a href=\"https:\/\/plus.google.com\/share?url=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fmise-a-jour-de-secure-boot-pour-windows-et-linux\" target=\"_blank\" title=\"Share on Google+\"><span class=\"quickshare-googleplus\">Google+<\/span><\/a><\/li>\t\t\t\t\t\t\t\t<li><a href=\"mailto:?subject=Refurbished+Computers+-+ComputerShop.EU:+Mise+%C3%A0+jour+de+Secure+Boot+pour+Windows+et+Linux&amp;body=https%3A%2F%2Fcomputershop.eu%2Fblog%2Ffr%2Fmise-a-jour-de-secure-boot-pour-windows-et-linux\" target=\"_blank\" title=\"Share via Email\"><span class=\"quickshare-email\">Email<\/span><\/a><\/li>\t<\/ul>\r\n\t<\/div>\r\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>La s\u00e9curit\u00e9 des syst\u00e8mes d&#8217;exploitation Windows et Linux entre dans une nouvelle \u00e9tape importante. Un changement majeur li\u00e9 au m\u00e9canisme de Secure Boot oblige les utilisateurs et les organisations \u00e0 mettre \u00e0 jour leurs syst\u00e8mes. Cette mise \u00e0 jour est &hellip; <a href=\"https:\/\/computershop.eu\/blog\/fr\/mise-a-jour-de-secure-boot-pour-windows-et-linux\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":5163,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[103],"tags":[19568,19521,19571,1277,19516,4233,19574,819],"class_list":["post-5168","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouvelles","tag-bootkit-fr","tag-certificats-secure-boot","tag-firmware-fr","tag-linux-fr","tag-mises-a-jour-de-securite","tag-securite-informatique","tag-uefi-fr","tag-windows-11-fr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - 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